제출 #1000358

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1000358		thelegendary08	봉쇄 시간 (IOI23_closing)	C++17	8 / 100	132 ms	36292 KiB

closing

#include "closing.h"
#include<bits/stdc++.h>
#define f0r(i,n) for(int i = 0;i<n;i++)
#define pb push_back
#define vi vector<long long int>
#define ll long long int
using namespace std;

int max_score(int N, int X, int Y, long long K,
              std::vector<int> U, std::vector<int> V, std::vector<int> W)
{
    vector<pair<ll,ll>> adj[N];
    f0r(i, N-1){
    	adj[U[i]].pb({V[i], W[i]});
    	adj[V[i]].pb({U[i], W[i]});
    }
    vector<vector<ll>>dist(N, vector<ll>(2, 4e18));
    vector<bool>vis(N, 0);
    queue<int>q;
    q.push(X);
    vis[X] = 1;
    dist[X][0] = 0;
    while(!q.empty()){
    	int c = q.front();
    	q.pop();
    	for(auto u : adj[c]){
    		if(vis[u.first])continue;
    		vis[u.first] = 1;
    		dist[u.first][0] = min(dist[u.first][0], dist[c][0] + u.second);
    		q.push(u.first);
    	}
    }
    f0r(i,N)vis[i] = 0;
    vis[Y] = 1;
    dist[Y][1] = 0;
    q.push(Y);
    while(!q.empty()){
    	int c = q.front();
    	q.pop();
    	for(auto u : adj[c]){
    		if(vis[u.first])continue;
    		vis[u.first] = 1;
    		dist[u.first][1] = min(dist[u.first][1], dist[c][1] + u.second);
    		q.push(u.first);
    	}
    }
    if(dist[Y][0] > 2 * K){
    	vector<ll> dists;
	    f0r(i, N){
	    	dists.pb(min(dist[i][0], dist[i][1]));
	    }
	    sort(dists.begin(), dists.end());
		int ans = 0;
		ll s = 0;
		f0r(i, N){
			if(s + dists[i] > K)break;
			ans++;
			s += dists[i];
		}
		return ans;
    }
    else{
    	ll ps[N][2];
    	
    	int ans = 0;
    	ps[X][0] = 0;
    	ps[Y][1] = 0;
    	for(int i = X+1; i<N;i++){
    		ps[i][0] = ps[i-1][0] + dist[i][0];
    	}
    	f0r(i, X){
    		ps[i][0] = ps[i+1][0] + dist[i][0];
    	}
    	for(int i = Y+1; i<N;i++){
    		ps[i][1] = ps[i-1][1] + dist[i][1];
    		
    	}
    	for(int i = Y-1; i>=0;i--){
    		ps[i][1] = ps[i+1][1] + dist[i][1];
    	}
    	
    	vi ps2;
    	f0r(i, N){
    		ps2.pb(ps[i][1]);
    	}
    	f0r(i, N){
    		//cout<<ps[i][1]<<' ';
    	}
    	//cout<<'\n';
    	f0r(l1, X+1){
    		for(int l2 = X; l2 < N; l2++){
    			f0r(r1, Y+1){
    				if(ps[l1][0] + ps[l2][0] + ps[r1][1] > K)continue;
    				int aaa = upper_bound(ps2.begin() + Y, ps2.end(), K - (ps[l1][0] + ps[l2][0] + ps[r1][1])) - (ps2.begin() + Y) - 1;
    				//if(2 + X - l1 + Y - r1 + aaa + l2 - X == 4)cout<<l1<<' '<<r1<<' '<<l2<<' '<<aaa<<'\n';
    				ans = max(ans, 2 + X - l1 + Y - r1 + aaa + l2 - X);
    			}
    		}
    	}
    	return ans;
    }
    
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17